Spark arrester



W s munme, SPARK ARRESTER. I APPLICATIION- FILEDNOV. 3,1921.

L153 Patnted May-351922 WILLIAM BUCKRI'DGE NUTTING, 0F PORTLAND, UREGON.

To all whom it may concern:

Be it known that L W simian Jeremie, a citizen or the United States, residing at Portland in the county of Multncmah and State of Oregon, have invented certain new and useful improvements in Spar! Arresters; and I do declare the following to be a lull, clear, and exactde'scription oi the in ;vemi011,su@11 aswill enable others skilled in the art to which it ap'pcrtains to make and use the same. i

This invention relates to an improved spark arrester which is especially designed free escape Of the smoke and gases permitted while dangerous sparks andhot particles are prevented from escaping and are returned into thestack.

Another and very important object of the invention is to provide a spark arrester which embodies superposed cones, the lower one of which is considerably larger and is inverted and the upper one being reversed so that the spark and hot Cinders will strike its inner surface and be deflected laterally and downward and back into the stack.

A further and important object oi: the in" vention is to provide an arrester embodying the aforesaid construction together with .guide means for the sparks and cinders arranged inside of the lower cone and dis-- posed over the upper end of the attaching pipe to effectively direct the sparks against the lnner faceof the upper cone, together with a novel deflecting device which has the a dd1t1ona1 function of decldedly increasing the life of "the upper cone by preventing the hot sparks from concentrating in the apex ofthe latter and damaglng the metal.

Other OlDJGCtS and advantages of the invention will be apparent during the course of the following description.

In the accompanying drawing formin part of this specification and in which like numerals are employed to designate like parts, the figure represents a perspective view of an arrester constructed in accordance Application filed November 5-3, 1921. Serial 512,556.

" I l sranir annns'rnn.

Specification of Letters Patent. Patentgrll llllay 2?, 1'9523.

with this invention, portions of the parts oi" the latter being broken away to disclose the construction and arrangement more clearly.

Before proceeding with the detailed de scription of the invention, 1 wish to state that the device may embody an attaching pipe to be telescopically engaged with the upper endfot the stack on which. the do; is to be mounted or the lower one of the superposed cones may be directly connected to the stack. However, by considering the following description, it will be seen that the lirst named construction is preferred.

Referring to the drawil'ig in detail and wherein the preferred embodiment of the invention is clearly illustratech it will be seen thatthe numeral. 1 designates a section of pipe of suitable length which is designeifl tobe telescopically engaged with the upper end of a smoke-stack. Supported on and secured to the upper end ottliis attaching pipe 1 in any suitable way are superposed cones 2 and3 respectively, the first named of which is considerably larger-and is in verted while the remaining one is smaller and is reversed. The upper edge of the lower cone is turned inwardly to provide a continuous flange 4'. which serves to assist in preventing escape of sparks and cindcrs. The lower end oil the remaining cone is formed with an intmi'ned flange which positioned below the first named flange and is spaced from the inner wall of the inverted cone to provide a space through which the smoke and gasesare permitted to escape. Suitable brackets 6 are employed for connecting the cones together in the position shown and in proper spaced relation to per- Init lree escape of the smoke and gas. Attention may here be directed to the "fact that the upper end of the attaching pipe extends slightly into the interior of the lower. cone 2 as indicated at 7 and a pocket 8 is thus :tormed between this pipe and inner wall of the last named cone which serves to collect a small portion of the particles. "Openings 9 are formed at the base of this cone and serve to permit escape ofthe particles from this pocket.

Supported and spaced from the inner face of this cone by means of suitable brackets 10 is an inverted conical deflector 11 which serves to direct sparks against the inner face of this cone 3 so that they will then be deflected laterally and downward against the inner face of the cone 2 and will either drop into the beneath the apex of the cone 3 burn up and leave only fine ashes which are.

aforesaid pocket 8 or fall back into the smoke-stack. Of course, all of the particles will not take this course and because of the strong draft created in the stack, some of the finer particles will be carried outwardly with the smoke andwill float into the atmosphere. In actual practice, this conical reflector 11 will be made of heavier metal than the other parts and thus prevented from being destroyed by the intense heat and hot sparks which contact it. By deflecting thehot pai ticles in the manner above suggested, the greater portion or them is prevented from becoming concentrated in the apex of the upper cone and the life of the latter is thereby greatly lengthened. For the purpose of assuring ellectiveness of operation, I also make use of a comparatively wide ring 12 which acts as a guide and serves to directthe hot particles into contact with either of the cones 11 or 3. Suitable brackets 14; serve to support the ring directly over the pipe 1. It may be added here that the ring 19, is considerably greater in diameter than the attaching pipe and that the diameter of the upper end of the inverted deflector cone 11 is just slightly larger in diameterthan the attaching pipe 1.

In operation the hot sparks and cinders are directed upwardly through the stack and into the arrester under the influence of the draught created in the stack and as they enter the arrester through the pipe 1, they are guided into contact with the downwardly inclined face of the conical deflector 11 and are partially broken up into fine particles. Some 01"? the latter move into contact with the inner face of the cone 3 and are deflected downwardly against the corresponding face of the cone 2 while others are directed laterally and downward as soon as they contact the deflector cone. Some oi the particles are then deposited into. the pocket 8 and permitted to escape through the openings 9 while others are dropped back into the smoke-stack. Of course, some of the particles find a Way between the cone 1]. and cone 3 and collect in the first named cone. From practical experience, however, it has been found that practically all of the particles deposited in the inverted cone will in time forced out of this cone in some instances by the draught or by the newly deposited heavier particles.

By carefully considering the description in connection with the drawing, persons liamiliar with devices of this class will doubtless be able to obtain a clearunderstanding of the invention. Therefore, a more lengthy and detailed description is deemed unnecessary.

Since probably the best results may be ob tamed with the construction and arrai'igement here n shown and described, this is taken as the preferred cinbodiinein. ol the invention. However, I wish it to be understood. that minor changes coming within the scope of the invention claim d may be resorted to if desired.

1 claim:

1. A. spark arrester including superposed cones, the upper one ol' which is comparatively larger and has its apex disposed upwardly and the lower one o i which is con siderably smaller and has its apex disposed downwardly with its base portion arranged within the corresponding pori'hin oi the lirsi. named cone and with its apex extending bc low the base of said first named cone, the base portion oi said inverted cone being. spac d from the inner i'ace oi the large cone, whereby the smaller cone is permittedv to act as a deflector and as means for prcvcinin; direct contact of the hot particles with She upper and apex portion ol' the large cone.

2. A spark ari'cstcr con'iprising superposed cones, the lower one ol which is considerably larger and inverted and the upper one of which is arranged with its ape): disposed upwardly, the base ol' said last named cone be ing ananged inside ot the corrcspoiulin; part of the lower cone and being spaced l'roni the inner taco of the latter to provide a space for escape 0i smoke and gases, an attaching pipe connected with said lower cone. a guide ring supported. by the latter and disposed directly over said attaching pipe. and an inverted conical. deflector sup mrtcd from said upper cone and disposed. in vertical alincment with said ringand attaching pipe for deflecting hot sparks and cinders laterally against. one or the other of said first named. cones.

3. A spark arrester comprising superposml cones, the lower one of which is truncated and is considerably larger than the upper one. and is inverted. and the upper cone having its ape): arranged upwardly. tho basc portion oi said last named cone being: arranged inside of the corrcspondin part ol' the lower cone and being spaced i roni the inner face of the latter to provide a space for escape of the Smoke and the gases. an I attachln. pipe connected with the lower rd duced e1 .l of the lower cone and extending into the interior thereof, a guide ring of greater diameter than the pipe positioned inside oi the lower cone and disposed directly over the pipe. being spaced away from the inner face of the lower cone and a couical deflector supported from the intermediate portion of the upper cone, havingits base spaced troni the inner face o't said last named cone andv having its apex extending below the lower edge of the latter into the upper portion of said guide ring.

In testimony whereof I have hereunto set my hand.

lVILLlAM BUCKRIDGE NUTIING. 

